Sometimes dream changes its form, but it’s always be with you. Don’t be afraid, just keep searching and trying what you want. Future is calling you.
Technical breakdown: At this time, I generated particles and masks with Blender’s Geometry Nodes for easy composition, instead of adding them on AE. Setting up nodes which decide the size of each particle by Z position of a divider object was obviously not easy for me, a newbie of this function. But I believe it saved tons of hours.
Unfortunately, Geometry Nodes currently don’t support physics. So, I added pseudo gravity by adding some velocity on particles also.
Applications: Blender 3.0 (alpha/beta), After Effects, Photoshop